I dont mind adjusting tappets. Its easy and you dont have to do it a lot. Carb tuning, at least where I live with a 30-35 degree diurnal swing, is not fun. I'd vote for UCE top end, or any top end with EFI.

Will the UCE top end give any major boost in power? I did see a couple of AVLs here with UCE top end and also an Iron barrel G2 350 with UCE Top end.

I didn't have that much guts to experiment that on mine

No. No power increase.But there could be some power improvement if this guy Ace ever gets his UCE mods done!:^)

And the Fireball Iron Barrel kits will bolt right on as it is. The only problem is that we haven't seen if the clutch and driveline will be successful at holding all the power we are going to run thru it.

Hello Singhg5 I had given up hope of this post ever getting back to the Thunderbird. The other thing I didn't mention about it which is pretty amazing is that it has a whole new beefed up triple tree and 41 mm forks for much greater front end stability. from ride reviews I have read, this , even with the "ape hanger bars" gives better cornering feel and stability than RE traditionals. I really think they have knocked the ball out of the park here, while still using the UCE and same basic frame. Conservative and innovative at the same time. I hope they bring it here. 500 + km on a single tank with upright riding position (and kick start) , the reliable UCE, dual disc brakes , nifty lights, ----WOW .... OK I'll grant it is not a "retro" , but WOW anyway: At least as interesting as the new Honda 250 single cylinder high miler, and a whole lot nicer to look at. There is no reason in my mind that this model couldn't carve out a whole new market right here in N.A. (not to mention Europe ) Nigel.

Hi Kevin ; Didn't know you were "listening" .Just expressing my opinion and enthusiasm. Love RE and love what they are doing. They are all great . This one is just a step forward. Ultimately forward is where things have to go, (even if that must means some of the innovations spill over to the traditionals).. I say Kudos to RE for this. I hope they do really do well with it, .....and maybe later rethink their marketing. I don't see this as an " Indian " (or Indian/African) model, I see it as a world model. (imho as the phrase goes) . Really , who in the real world needs 100 mph bikes. A lot of people would appreciate the fuel mileage and range of these however. Mark my words, as the economy continues to involute and gas prices keep going up, this is going to be right on the money. And really, if Redditch had all the wherewithal and technology to do this "in the day" don't you think they would have? If the British motorcyle industry had been more adaptive, we might have seen just this. Nigel.